Repeat this problem, but assume the ambulance and car are going the same direction, with the ambu- lance initially behind the car. the speeds and the frequency of the siren are the same as in the example. find the fre- quency heard by the observer in the car (a) before and (b) after the ambulance passes the car. note:
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Madison pushes with a 210-n horizontal force on a 24-kg crate of coffee resting on a warehouse floor. the force of friction on the crate is 74 n. what is the acceleration?
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Find an expression for the electric field e⃗ at the center of the semicircle. hint: a small piece of arc length δs spans a small angle δθ=δs /r, where r is the radius. express your answer in terms of the variables q, l, unit vectors i^, j^, and appropriate constants.
Answers: 1
Repeat this problem, but assume the ambulance and car are going the same direction, with the ambu- l...
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